Radial velocities of nearby K and M dwarfs
A correlation radial-velocity meter was used during 1985-87 to make 931 measurements of the radial velocities of 206 nearby stars in Gliese's catalog. The characteristic accuracy was 0.5 km/sec. A homogeneous sample of 162 K and M dwarfs in the region delta > -10/degree/, 14/sup h/ < ..cap alpha.. < 3/sup h/ contains 41 stars with variable or probably variable velocity; 10 stars have been identified for the first time as spectroscopic binaries. The fraction of spectroscopic binaries in the classes K0-K2 is 17%, in the classes M0 and later 36%, and in the complete sample 27%. Among the systems with a period less than one year low-mass (M/sub 2/ sin i < 0.1Msub solar) satellites have not been found; for all stars the velocity spread exceeds 7 km/sec. For the systems GL 58.2 and 791.3, which have the greatest mass function, the lines of secondary components have been detected.
- Research Organization:
- P.K. Shternberg State Astronomical Institute (USSR)
- OSTI ID:
- 5899435
- Journal Information:
- Astrophysics (Engl. Transl.); (United States), Vol. 28:2; Other Information: Translated from Astrofizika; 28: No. 2, 297-310(Mar-Apr 1988)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
BINARY STARS
RADIAL VELOCITY
DWARF STARS
CLASSIFICATION
DATA COVARIANCES
EMISSION SPECTRA
LINE WIDTHS
MASS
REMOTE SENSING
SATELLITES
STAR EVOLUTION
STELLAR RADIATION
STELLAR WINDS
VARIATIONS
SPECTRA
STARS
STELLAR ACTIVITY
VELOCITY
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources